Modifying fuel system so temperature input to VP44, 80* - 100*, your inputs.

[rweis]

I am in the process of installing a fuel cooler in the VP return line, VP return line will be to the tank filler line, fuel temp gauge just prior to the ff, so I can get the fuel feed to the VP in the 80* - 100* range primarily for cooling the VP properly and I hope to keep the VP electronics from overheating. Fuel cooler willl have a bypass valve for winter driving below 50*.

What problems do you see with the concept?

What I know:

Input fuel should not reach a maximum of 160* (Bosch limit)

Input fuel is used for cooling as well as lubrication. More cooling fuel seems to be bypassed at higher rpm's.

There is an internal Vp44 fuel temperature compensator (of some sort).

The VP electronics can and do get overheated with heat cycles over time. I am going to try to keep the whole VP mechanism cooler.

Do not go below the cloud point for fuel gel purposes.

Lubricate the fuel (low sulfer fuel?), (I use Stanadyne Performance).

Clean the free water out of the fuel, clean any particulates out of the fuel (I use a RACOR 690T).

All fuel lines are AN-6. All full flow fittings. No restrictions in any lines.

RASP mechanical pump being installed in this iteration.

I am asking for your inputs. Do you see anything wrong, not quite right?

Some of you have extensive diesel experience, please give your inputs and ideas.

Bob Weis